DEADLY MYSTERIES FROM FIRE TO ICE!Constructing his fantastic new spaceship, the Starward, beneath the sea, Tom Swift's worksite is targeted by strange raiders whose hypersonic Fire Fury jetcraft is a formidable weapon, a threat wielded by a fanatical faction known as the sentimentalists. Invading the Swift home in Shopton, they demand that Tom solve the mystery of the disappearance of their leader--an unaccountable disappearance in space! As vengeful, secret foes work to undermine Swift Enterprises and a rival invention establishment, the young inventor links the disappearance to an object in the furthest reaches of our solar system, a space anomaly that hides its nature within a black region that defies probing by terrestrial science. To reach the object during the Swift Grand Tour of the icy outer planets, Tom must perfect a propulsion system, the cosmotron spacedriver, whose radical space-bending principle may be as dangerous as the Sentimentalist enemies--and the distant Black Window itself! By the author of the YOUNG & SMART series.
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